Automatic elevator-door opening and closing apparatus.



C. M. EINFELDT.

AUTOMATIC ELEVATOR DOOR OPENING AND CLOSING APPARATUS.

APPLICATION man 05c. a0. 1913.

1,149,742. Patented Aug. 10, 1915.

v I v 3 SHEETS-MEET lr 51 6 gg lu, 9 v 75 2 0.0.0.0.... 000000 Z ozozozozozo. zozooooo i C. M. EINFELDT. AUTOMATIC ELEVATOR DOOR OPENING AND CLOSING APPARATUS.

APPLICATION FILTED ,DEO. 30, I913- Patented Aug.

3 SHEETS-SHEET 2- i |L| I 1 1 44,

A 0 w B w/ W O l l w Wm o 7 u w J 4 90 m w w w w w. w w x S m II 6 W a J 5 7 'C. M; EINFELDT.

AUTOMATIC ELEVATOR noon OPENING AND CLOSING APPARATUS.

APPLICATION FILED DEC. 30} I913- Patented Aug. 10, 1915.

X A Q 3 SHEETSSHEET 3- erases ra ranr canes.

CHARLES M. EINFELDT, OF DENVER, COLORADO.

AUTOMATIC ELEVATOR-DOOR GPENING AND CLOSING APPARATUS.

Application filed December 30, 1913.

To all whom it may concern:

Be it known that 1, CHARLES M. EINFELDT, a citizen of the United States of America, residing in the city and county of Denver and State of Colorado, have invented a new and useful Automatic Elevator-Door Opening and Closing Apparatus, of which the following is a specification.

My invention relates to an automatic ele vator door opening and closing apparatus;

and the objects of my invention are: First,

to provide a door opening and closing system for elevators, comprising a fluid operated lift, a rotatable disk operated by said lift, a second rotatable disk on the shaft of the first disk having a door operating lever, a clutch for locking said disks, electrically operated means in circuit with a source of nismvon each landing, whereby each door lift operates to close the door.

opening mechanism is operated independcntly of the others, electrically operated means for controlling said lift, said door opening means and lift controlling means being in circuit with a source of power, terminal contacts on each landing, and a brush on the car in make and break connection with the power source for closing a circuit through said power source at each landing, whereby each door opening mechanism is rendered operative independently of the others, and means for reversing the operation of the lift-controlling means when the circuit is opened by the passing of the car beyondthe landing, whereby the said Third, to provide an automatically operating fluid controlled elevator door opening and closing apparatus for the passenger QlBWLtOFS of ofiice and other buildings, that is under'the control. of the pilot within the elevator car, and that cannot be operated by the pilot until he has stopped his car at a floor to Specification of Letters Patent.

Patented Aug. 10, 1315.

Serial No. 809,524.

take on or to discharge passengers, and that locks all of the other elevator'doors in the elevator shaft closed. And fourth, to provide an automatically operating elevator door opening and closing apparatus, that is electrically controlled from a switch in the elevator car, but that can be operated by the pilot by hand in case the apparatus from any cause fails to work either in whole or in part.

I attain these objects by the mechanism illustrated in the accompanying drawings, in which:

Figure 1, is an elevation illustrating the basement and two landings of an elevator shaft, as they appear when looking from the elevator, and showing the door opening mechanisms, the fluid-operated lift connected with said mechanisms, the electrically operated means for rendering the mechanisms independently operative, and the electrically operated valve for controlling the operation of the fluid operated lift. Fig. 2, is a vertical sectional view through the portion of the shaft shown in Fig. 1, and also through a portion of a car, illustrating a looped circuit wire connected with a circuit closer on the car, which is adapted to engage terminal contacts on the several landings. Fig. 3,. is a diagrammatic vertical sectional view illustrating more clearly the electrically operated mechanisms and their connection with a power source. Fig; 4, is a front elevation of one of the door opening and closing mechanisms, showing the manner of its connection with the rod of the fluid operated lift. Fig. 5, is a top plan view of Fig. 4. Fig. 6, is a central, vertical sectional view of Fig. 4. Fig. 7, is a front view of a portion of the mechanism as shown in Fig. 4, but showing the track for locking the clutch-operating cam in the position it assumes when the circuit is open through its operating magnet. Fig. 8, is a front edge view of the locking track for the clutch-operating cam. Fig. 9, is a front view of the divided clutch ring. Fig. 10, is an end View of the clutch cam. Fig. 11, is a side view of the same. Fig. 12,

'is a vertical, sectional view through the fluid Referring to the drawings,Figure 1 designates a sectional elevation-through two floors 2 and 3, and the basement 4:, of an oflice building. In the basement 4, I place a fluid operated motor of any suitable type. I have preferably illustrated, however, as the motor of my elevator door opening and closing apparatus, a vertically arranged hydraulic cylinder 5, which is preferably constructed of tubing, although if desired it may be a cast cylinder. This cylinder is provided with a suitable foundation base plate 6, which is preferably threaded to it, and that is adapted to be secured to any suit able foundation, or the floor of the cellar.

The cylinder 5 is.,provided with a piston head 7, from which a piston rod 8 projects vertically beyond the upper end of the cylinder a predetermined distance. The piston head and piston rod are adapted to be moved on the upward stroke of its reciprocal movement, by water under a suitable pressure to operate the piston and the door opening and closing mechanism, and in the other direction of its reciprocal movement the piston head 7 is preferably arranged and adapted to be moved by a coiled spring 9, which sur rounds the piston rod. One end of this spring bears against the piston head, and the opposite end bears against an'adjustable spanner plate 11, which is slidably mounted on a pair of threaded rods 12, which are secured to a flange 13 that is threaded or otherwise secured to the upper end of the cylinder. The rods 12 may be secured to the fiange'by any suitable means, but are preferably threaded thereto. The outer ends of the rods extend loosely through apertures 14, formed in the opposite ends of the spanner plate, and nuts 15 are threaded onto their outer ends, which are turned against the outer side of the spanner plate, which can be moved toward this cylinder to adjustably compress the coiled spring to impart sufiicient pressure against the piston head to move it on the downward stroke of its reciprocal movement.

The piston rod 8 extends entirely up through the elevator shaft 16 of the building, and it is preferably made of lengths of piping coupled together, and it is supported at its upper end and at suitable intervals in its length by bearing boxes of any desired and suitable construction; as illustrated, its upper end is supported by a journal box 17, which is secured to the adjacent floor of the building.

the cylinder, through an aperture 18 formed therein, to which one end of apipe 19 is connected, the opposite end of which is connected to any suitable valve, and my inven tion contemplates the use of any operative valve and of any means of manipulating and controlling the same, either mechanically or electrically or by any suitable fluid pressure. I preferably, however, carry out this feature of my invention in the following manner: A valve 20 isprovided that comprises a casing, in which a stem'22 is reciprocally mounted. The casing is provided with an outlet and inlet aperture 23, to which the opposite end of the pipe 19 is threaded, and on the opposite side of the casing from. the aperture 23, an inlet aperture24 is formed, and at a short distance from the inlet aperture. 24, a discharge aperture 25 is formed. To the inlet aperture 24 I connect one end of a pipe 26, and this pipe leads to and is connected to a supply of water underlpressure. To the discharge aperture 25 of the valve, I connect one end of a pipe or hose 27, and this leads the water discharging from the valve to a tank, which I do not illustrate, and it is used over and over again, as in hydraulic elevator systems, or if desired this discharging water is led to waste. The reciprocating valve stem of this water inlet valve, is provided with a pair of water passing ports 28 and 29, which are positioned at such a distance apart that when the stem is depressed, the port 28 opens communication between the inlet 24 that is connected to the water sup ply, and the aperture 23 which is connected with the hydraulic lift and when the stem is raised as shown in Fig. 13, the port 29 opens communication between the aperture 23 and the discharge aperture 25, the stem being in its depressed position when water is entering the hydraulic lift and in its raised position when water is discharging from the said lift, and out through the pipe 27.

The ports 28 and 29 in the valve stem, comprise circumferential recesses formed in the valve stem, and they are made long enough to register with the three water passageways in the casing during the reciprocal movements of the valve stem. Thus the port 28 of the valve stem will register with the water supply inlet aperture and with the door operating cylinder port of the casing, during one stroke of the valves piston, and will close the water supply inlet port and will open the door operating cylinder port of the casing'and the discharge port of the casing to register with each other through the port 29 on the opposite or return stroke of the valve stem in the casing.

The valve stem is reciprocated in one direction of its movement by a solenoid 30,

into which its lower end extends, and which Water is conveyed into the lower end of is energized by circuit wires 84 and 85, which are operatively connected in circuit with an electric power source, and are connected to the door opening mechanism, as will be presently described. The valve stem in the opposite direction of its reciprocal movement is operated by. a spring 33. There are a number of ways in which these features of myinvention may be carried out, but I preferably arrange them in the following manner: The valve stem 22 extends far enough beyond the end of the casing of' the'valve to extend into theaxial bore 34 of the solenoid 30, which is fixed to a suitable support. The end of the valve'stem that enters the solenoid is arranged to be drawn by the solenoid into its bore far enough to connect the ports 23 and 24, by means of its port 28. The opposite movement of the valve stem, that is, out of the solenoid, is effected by the spring 33, which is interposed between the upper end of the valve casing and a disk 35, on an upwardly extending portion 37 of the valve stem, the disk being loosely mounted on the portion 37, and being held in place by a nut 38, which is screwed upon the end of the extension 37, so as to hold the spring 33 under tension. When the current is cut off from the solenoid, the spring 33 moves the valve to close the inlet ports 24, and open the ports 23 and 25. The piston rod 8, is provided at points just above the landings or floors, with split sleeves 39, having ears 40, through which clamping screws 41 pass, by means of which the sleeves 39 are rigidly secured to the rod. The sleeves 39 have projecting pins 42, upon which are pivotally mounted arms 43, which terminate at their lower ends in hubs 44', in which are slidably mounted the outer ends of arms 45, which project from cam disks 46, which are mounted on pins 47 which are supported by brackets 48. secured to each floor or landing of the elevator shaft. The brackets have base plates 48*, which rest upon and are secured to the landings, and these base plates are provided with guides 48 through which the piston rod 8 passes. A flanged clutch disk 49 is mounted on each of the pins 47, adjoining the disk 46. Each disk 49 is provided with an arm 50, which is secured at its inner end in a socket 51, formed on the disk, and which extends from said socket to and is pivotally connected to the forward edge of an elevator door 52, by a pin or bolt.

Each arm 50 comprises two parts connected by a pivotal joint 53, which is positioned in termediate of its length, and which is arranged to form an elbow joint in the arm, which is positioned at such a predetermined distance from its outer end as will permit the arm to bend and move with a swinging movement that will exert a direct pull on the door of the elevator to open the same, and a direct pushing movement when closing it. A stop lug 55 is secured to each door in position to limit the movement -of the jointed arm when closing the door and to support it in operative door opening position.

The piston head and piston rod of the hydraulic lift operate the arms 45 'and 50 to open and close the door of each floor of the office building by their reciprocal movements. The starting of the movement of the piston head and piston rod, which effects the opening and closing movement of the elevator door on each floorof a building, is under the full and absolute control of the elevator pilot who is within the cage at all times. My invention contemplates any means by which an elevator pilot can operate the motor and lever mechanism of the elevator door opening and closing apparatus at each floor of a building to open or close the door leading into and out of the same. I preferably, .however, use and illustrate an electrically operating apparatus that is under the control of the pilot, and that may be arranged to be operated by either the hand or the foot as desired. I have preferably, however, illustrated a foot operated electrical apparatus which is arranged as follows: The arms 45 and 50 of the disks 46 and 49 respectively, project from the side of these disks at such an angular relation to each other as will enable them to work to the best advantage in their door opening and closing movements, andthey are operated as follows: A divided resilient band or ring 56 is positioned within the annular rim or flange of the disk 49, so as to lie flush with the edge of the same. This band fits loosely within the said flange, and its ends 57 are separated by a space of suitable width and are widened, as shown. Diametrically opposite the ends 57., the band is provided with an apertured lug 58 through which a bolt 59 is passed, and extends through an aperture in the disk 46, and is secured thereto by a nut 60. The band is thus secured to the disk 46, but is surrounded by the flanges of the disk 49,'and this flange and the band constitute a clutch, the band being spread to engage frictionally the'flange of the disk 49, in a manner to be presently described, so that the disk 49 may be moved simultaneously'with the disk 46. in opening a door, or remain stationary while the disk 46 is turned, when it is not desired to open the door connected therewith. A pin 61 is pivotally mounted in the upper portion of the disk 46, in position to extend in between the ends 57 of the band 56, andthe portion of this pin which lies between the said ends 57 is provided with an elongatedhead 62,

which is of greater length than the space between the ends 57, and normally stands in position to be out of engagement with said ends, as shown by Fig. 7: but when the pin is turned, in a manner to be presently described, the extremities of the elongated head engage the ends 57 of the band 56. and act as a cam to spread the ends so that the band engages the annular flange of the disk 49, thereby locking the said disk to the disk 46. To the outer end of the pin 61, is keyed or otherwise rigidly secured an arm 88, the opposite end of which carries a pin 84, upon which is mounted a roller 65, the arm 68 being normally in the position shown in Fig. 7. When the arm 68 is raised, the pin 61 is thereby turned, and its head 62 engages the ends of the band 56, to spread them as above.

mentioned, and this arm is raised in the following manner: Upon the hub 66 of each bracket 48, is formed an arm 67, to which is suitably hinged one end of a segmental rim or track 68, on the outer side of the forward portion of which is formed a lug 69, which registers with a corresponding lug 79 on the hub 66. These lugs have registering recesses in which is confi ed a coiled expansion spring 71, which normally holds the track 68 in an elevated position, as shown in Fig. 7. The hinged end of the track terminates in a substantially right angled member 72, which constitutes the armature of a magnet 73,

which is connected in circuit with a power source, and is mounted on a bracket 74, which is secured to the adyacent edge of the standard 48, in coiiperative relation to the said armature.

When a circuit is closed through the magnet, the armature 72 is thereby attracted, and the track 68 is rocked on its hinge, so that its lug 68 bears against the lug 70 on the hub (36, and the upper and lower edges of the track are so curved that when the track is down, or in the positionshown in Fig, 4, its upper edge is concentric with the pin 47, and when the track is raised, as in Fig, 7 its lower edge is concentric with the said pin. Each door-opening mechanism operates independently of the others, and as a car reaches a landing where it is desired to open. the door, a circuit is closed through a power source, in a manner to be-presently described, and the magnet 73, at that landing, rocks the track 68,.into the position shownin Fig. 4, and simultaneously therewith, the hydraulic lift is operated and'the piston rod 8 raises all the rods 45, and con y sequently partially rotates all of the plates or disks 46, but at all of the landings, excepting the one whose door is to be opened, the tracks 68 are raised, as in Fig. 7, and as the disks 46 of these mechanisms rotate, the rollers of the arms 63 pass beneath the tracks 68, the clutch bands 56 turning with in the flanged rim of the clutch disk 49; without turning them. On the landing, however, whose door is to be opened, the

track 68 is down in the position shown in Fig. 4, and as the disk 46 revolves, the roller 65 on the arm 63 engages the curved end of the track 68, and rides over theupper edge thereof. The arm 63 is thereby lifted, and the cam head 62 of the pin 61 spreads the clutch band 56, so that the flange rim of the disk 49 is thereby engaged and the disk 78 on the top landing.

49 turned in unison with the disk 46, and the hinged arm 50 is swung to open the door.

The vertical faces of the landings 7 5 of the elevator shaft are each provided with parallel contact strips 78 and 77, and the elevator 78 is provided with a brush 7 9, wide enough to engage each pair of the said contacts as the car ascends or descends. A switch 80 is located in the car adjacent to the brush 79, and as illustrated the switch is adapted to be operated by the foot of the pilot, though, in practice, it may be operated by hand, or automatically by the movement of the operating lever for starting and stopping the elevator. A circuit wire 81 is connected at one end with the switch 80, and at the. other end with a. source of power, a battery 82 being illustrated, As the wire 81 must move with the elevator, it is of sufficient length to reach from the basement to the top floor of the building, and at a point half way between the extreme movements of the elevator, the wire is secured to the side of the shaft, so that the portion of the wire above the point where it is secured to the shaft is raised and lowered by the elevator, as will be understood by reference to Figs. 2 and 8. A circuit wire 83 extends from the opposite pole of the battery to the magnet One of the terminals 84 of the solenoid 30 connects with the circuit wire 83, and the other terminal thereof connects withafeed wire 85, the opposite end of which connects with contact 77 on the top landing. The terminals of the other magnets are connected by wires 86 with the wire 83, and by wires 87 with the contacts 7 6; the contacts 77 below the top landing being connected with the circuit wire 85, by wires 88. By this arrangement, a circuit is closed through the solenoid and any one of the magnets 73, when the brush 79 engages a pair of the contacts 76 and 77, and the switch 80 is pressed to engage the brush contact. The arrangement of the wiring makes it impossible for a circuit to be closed through any of the magnets, but the one connected with the contacts which are engaged by the brush. When the brush engages a pair of contacts, and the switch 80 is pressed to engage the brush terminal, a circuit is closed through wire 81, which con nects with one pole of the battery, switch 80, brush 79, contact 76, and through wire 87 to magnet 73, thence through wire 86 to wire 83, which leads to the opposite pole of the battery 8:2. Simultaneously therewith a branch circuit is closed through the solenoid by the contact 77, wires 88 and 85, through solenoid and wires 84 and 83 to battery; thence through wire 81, switch 80 and brush 7 9 to contact 77. The switch should remain closed while the door is open, and until the elevator starts. lhese various successive steps or movements of the door opening apparatus occupy, however, only a few seconds of time from the instant the pilot by pressing his foot against the switch opens the water inlet valve, until the elevator door is open. Consequently the pilot does not press his foot onthe switch until he has stopped his car at a landing, to take on or let out passengers, and having either admitted or discharged passengers, he takes his foot 0d of the switch 80, and the door closes. The pilot can, however, hold the door open as long as he pleases after the car has stopped at a landing, by keeping his foot on the switch, but the instant, however, that he takes his foot off the switch, the circuit tothe magnet 73 and solenoid 30 controlling the water in'letvalve, is broken, and the spring 35 of the solenoid 30 throws the valve stem to open the water discharge ports of the valve, which causes the water to rush. out of the hydraulic cylinder in an instant, as the piston head is forced down against the water by the spring 9, and the piston rod.

falls instantly and moves the arm 45 with it, turning the disk 46 back again, carrying with it the arm (33, the roller 65 of which rolls down the rim or track 68, which move ment closes the elevator door, as the clutch band 56 is still tightly clamping the clutch disk 49, and it is turned back with the disk 46 until the door is closed, which backward movement requires but a second of time. lVhen the roller 5 passes down over the end of the track, the coil spring 71 throws the track up in the position shown in Fig. 7. lVhen the arm-G3 is moved to the limit of its downward movement, the clutch band is released from engagement with the clutch disk, andthe disk 46 is free to rotate independently of the disk 4E9.

If it is desired to skip one or more doors as the elevator goes up and down in the elevator shaft, the switch is left open, and the car can run up and down the shaft its entire length without opening a door. Another great advantage my apparatus has is this, that any door in the elevator shaft canbe opened and closed by the pilot by hand, as the door opening arm 50 and its disk 49 are free and independent of the automatic door opening mechanism, except when the apparatus is electrically started through the medium of the foot switch. Consequently if at anytime the pilot should stop his car at a floor and place his foot on the switch to open the door automatically by the door opening apparatus, and he should fail to open the door, all he has to do is to reach over and grasp the lever 50 at its joint, and open it with his hands, and he can also close the door with his hands. Or assuming that when the pilot has stopped his car at a landing, he places his foot on the switch to open the door, and the current energizes the solenoid 30 and opens the water inlet valve, and the piston rod and the arm 45 rise and the disk 46 turns on its pin, for some cause the magnet 73 fails to move the track 68, the disk 46 would be turned on its pin 47 and the roller end of the-lever would reciprocate under the rim, and the clutch band would be loose and free in the flange of the disk 49. disk and its lever 50 would not be moved and the door would not open and the pilot would have to open and close it by hand. Thus it can be seen that the door can be opened and closed, even if the automatic door open-- ing and closing apparatus does not work either in whole or in part.

It can be seen that the automatic door opening apparatus is with the exception of the operating switch, wholly outside of and independent of the car, and its action, either when the car is ascending ordescending in the elevator shaft, and that the door can be opened and closed by hand by the pilot should the door opening'apparatus from any cause get out of order, as the mechanism for raising and lowering and for starting and stopping it is wholly independent of it and is not in any way connected with it.

The operation of running an elevator equipped with my automatic door opening and closing apparatus, is as follows: The pilot when admitting passengers or discharging them from the elevator, first stops his car even with the fioor; then he places his foot on and presses the switch down to make the desired circuit contact with the supply of electric current, which sends the current simultaneously to the solenoid 30 and magnet 73, and starts the door 0 nin apparatus to open the door, and he ho ds the switch down with his foot, which. action holds the water inlet valve continuously open which permits a continuous How of water under pressure to the hydraulic cylinder, which holds the entire apparatus at the end of its door opening movement, and consequently holds the door wide open as long as the pilot holds his foot on the switch; then having received and discharged all the passengers, he has at that floor, he takes his foot 01? of the switch and the apparatus instantly closes the door throu h the action of the mechanism as above pilot then starts his car and goes to the next floor, where his si als tell him a passenger or passengers desire to enter or leave the car, and it may happen that he does not have to stop at the next or otherfloors, in which case he does not touch the switch until he does stop at another floor, when he again presses the switch and opens and close the door, and then again starts and goes on. The circuit wires are so arranged that only the magnet 73 of the floor bracket is energized by the current passing through the switch Consequently the door opening escribed. The Y at the floor the car is stopped at, and all of the other magnetsabove and below that particular floor at which the car is stopped are out of circuit. The switch, however, always connects the solenoid 30 of the water inlet valve in circuit simultaneously with the magnet 73 of the bracket and floor where the car is stopped, which throws the rock arm to guide the roller up onto the rim, causing the clutch band to grip the disk 49 and move the lever to open the door of this floor, at which the car was stopped, but of course the arms a5 and disk 46 of all of the brackets of all of the other floors, would be moved reciprocally by the piston rod 8, and the rollers of the levers 68 of all floors above and below the floor where the car was stopped would reciprocate under the rim and the clutch band would turn loosely and freely in the door opening disks 49 of these floors. Consequently the doors of all the other floors would not be opened or in any way interfered with, and the lever 50 is positioned at such an angle that it acts as a lock against the easy opening of a door, as it is necessary to raise and break the elbow joint of the lever 50 in order to roll a door back. This can be done easily by hand by the pilot from the inside of the car, but it is difficult for one outside of the car to do it.

My invention provides a simple, durable and reliable automatic operating door opening and closing apparatus, and while I have illustrated and described the preferred contruction and arrangement of my invention, I do not Wish to be limited to it, as many changes might be made without departing from the spirit of my invention or the scope of the appended claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In an automatic operated elevator door opening and closing apparatus, the combination of the elevator shaft, the floors and the elevator car, said floors having doored inclosures, with a cylinder, a piston head reciprocally mounted in said cylinder, said piston head being arranged to be moved on the upward stroke of its reciprocal movement by a supply of water under pressure, a water inlet valve connected to said cylinder, an electric magnet arranged to open said valve to admit water to said cylinder, a switch in 'said elevator car in circuit with the magnet controlling the water inlet movement of said valve, and spring controlled means for moving said valve and said piston head to discharge said water from said cylinder, a piston rod connected to said piston head and extending reciprocally through said shaft, an operative door opening and closing mechanism mounted on each floor and connected to said piston rod and to they elevator inclosure door of each floor, and

means including a friction. operating clutch device between the reciprocal piston rod, and said door opening and closing mechanism, and including a magnet arranged to control at any predetermined floor said clutch and in circuit with said elevator switch, parallel contacts attached at each loor in the pathof said car, a brush contact attached to said car and arranged to engage the parallel contacts of each floor as said car moves up and down in said shaft, said car brush being adapted to be engaged by the operating switch in said car.

2. In an apparatus of the character de scribed, the combination of a building, the floors thereof, an elevator shaft therein pro vided with an elevator door supporting inclosure around said shaft on each floor. and the elevator car, with a vertically arranged rod reciprocally mounted in said shaft, and

a motor arranged to reciprocate said rod,'

said rod being provided adjacent to each door with an ad ustable clamplng clip, said clip being provided with a swiveling sleevemember adapted to receive slidably a rod member of the door operating mechanism, and means including a friction clutch mechanism and a rod slidably mounted in said swiveling sleeve, for automatically opening and closing said elevator door.

In an apparatus as specified, the combination of the floors, the shaft, the doors and the car, with a reciprocating piston in said shaft, the bracket at each floor provided with a bearing, the clutch disk revoluble on said bearing and provided with a jointed arm, said arm being pivotally connected at its outer end to the elevator door of that floor and arranged to open and close the same, said clutch disk being provided with a rim portion provided with an interior friction surface, a split ring having separated ends pivotally secured within said rim, and arranged to engage with frictional gripping and releasing movement the internal frictional surface of said rim, the cam disk loosely mounted on said hearing at the side of said clutch disk. a cam pivotally supported by said cam-disk and arranged to extend between and engage the ends of said friction ring, an arm on said cam provided with a roller at its end, and means including a rock arm and an electrically operating magnet operatively connected to the switch in said car for operating said cam to engage or rel ease said clutch as desired in running and stopping said car and opening and closing the ele 'ator doors of said floors.

4. In an apparatus of the character described, the combination with a shaft and its landing, and an elevator in said shaft, of brackets on said landings, disks mounted on each of said brackets, a door opening lever on one of said disks, a clutch on the other disk adapted to engage the lever-carrying i, matte disk, means carried by the clutch carrying disk for operating said clutch when its disk is turned, a hinged arm for the clutch operating means, one end of which terminates in an armature, a hydraulic lift, a vertical rod extending up through said shaft and operated by said lift, and arms connecting said rod and vthe clutch carrying disks, a valve for controlling the flow of Water to said lift, a spring for moving said valve in one direction, a solenoid for moving it in the opposite direction, magnets for operating the hinged clutch arm, and in cotiperative relation with the armature thereof, contacts on the landings in circuit with the magnetsand solenoid and a power source, a brush on the car for engaging the contacts on the landings, and a switch in connection with said brush and in circuit with the power source for closing a circuit through a magnet, the solenoid and source of power when the car brush engages the contacts at any one of the landings.

5.- nism for elevators, a bracket, a pin mounted thereon, a disk mounted on the pin, having In a door opening and closing mechaan annular flange, a lever carried by said disk, a second disk mounted on said pin, a divided ring carried thereby and lying within the annular flange of the first disk, a pin mounted in the second disk, having an elongated head which lies between the ends of the divided ring, an arm secured to the outer end of the pin, a roller on the free end thereof, an arm on said second disk and adapted to be operatedto turn said disk, a curved track hingedat one end, and adapted to engage said roller, when the disk is turned, thereby to lift the said pin carrying arm and hold the same lifted whereby the elongated head of the pin spreads the divided'clutch ring and locks the said first and second disks together, electrically operated means for rocking said curved track into roller engaging position, and a spring for lifting said track out of the path of the roller.

6. In a door opening and closing mechanism for elevators, a bracket, a disk mounted thereon having an annular flange, a door opening lever carried by said disk, a second disk on said bracket, a divided ring carried by said second vdisk and lying within the flange Or the first disk, a track hinged at one end to the bracket, an armature on the hinged end thereof, a magnet adjacent to said armature and arranged to attract the same and thereby rock the arm so that its upper edge will be concentric with the axes of said disks, a spring for moving the track in the opposite direction, a pin mounted in the second disk having an elongated head which lies between the ends of the divided clutch ring, an arm keyed to said pin having a roller on itsopposite end, a radial ar-n carried by said second disk, whereby the floors thereof, an elevator shaft therein provided with an elevator door supporting inclosure around said shaft, and the elevator car, with a vertically arranged rod reciprocally mounted in said shaft,-and a motor arranged to reciprocate said rod, said rod being provided adjacent to each door with an adjustable clamping clip, saidelip being provided with a swiveling sleeve member, a rod member slid-ably connected to said swiveling sleeve,-with a bracket secured to each floor adjacent to the door of each doored inclosure, and provided with a hearing, a friction clutch mounted loosely on said bearing, comprising a clutch disk provided with door opening means and with a rim portion having a friction gripping surface formed on'its inner peripheral wall, a friction gripping split ring within the rim portion of said clutch, said ring being split and its peripheral edge separated into two opposite ends that are arranged at a short distance apart, a second disk carrying said rod member and said split ring mounted loosely on said hearing at the side of said clutch disk, and against its rim portion, provided with a journal bearing aperture transversely through its peripheral edge portion, a pin pivotally journaled in said bearing,a double'armed cam secured to the end of said pin and extending between the separated ends of said divided friction gripping ring, and positioned to be moved to engage the opposite ends of said ring and to move them to expand them to cause said ring to grip the inner peripheral wall and friction surface of said clutchdisk, an arm secured to the outer end of said cam pin and arranged .to lie at a tangentially arranged angle from its center alongside of said cam disk, and a roller pivotally m0unt- I ed on the end of said arm, a projecting arm on said bracket, a rim shaped track pivotally attached to said arm at one end, and arranged in the path of and to be engaged by said roller, resilient meansfor moving the free end of said track rim out of the path of said roller on the non-clutch-gripping scribed, the combination of a building, the floors thereof, an elevator shaft therein propided with an elevator door supporting in closure around said shaft on each floor, and the elevator car, with a vertically arranged rod reciprocally mounted in said shaft, and a molar arranged to reciprocate said rod, said rod being provided. adjacent to each floor with an adjustable clamping clip, said clip being provided with a swiveling sleeve membe a rod member slidably connected to said swiveling sleeve, with a bracket secured to each floor adjacent tc the door of each doored inclosure, and provided with a bearing, a friction clutch mounted loosely on said bearing, comprising a clutch disk provided with door opening means, and with a rim portion having a friction gripping surface formed on. its inner peripheral wall, a friction gripping split spring ring within the rim portion of said clutch, said ring being split and its peripheral edge separated into two opposite ends that are arranged at a short distance apart, a second disk carrying said rod member and said split ring, mounted loosely on said bearing at the side of said clutch disk and against its rim portion, provided. with a journal bearing aperture transversely through its peripheral edge portion, a pin pivotally journaled in said bearing, a double armed cam secured to the end of said pin and extending between the separated ends of said divided friction gripping ring and positioned to be moved to engage the opposite ends of said ring and to move them to exanaemia pand them to cause said. ring to grip the inner peripheral wall and friction surface of said clutch disk, an arm secured to the outer end of said. cam pin and arranged to lie at a tangentially arranged angle from its center alongside of said cam-disk, and a roller pivotally mounted on the end of said arm, a projecting arm on said bracket, a rim shaped track pivotally attached to said arm at one end and arranged in the path of and to be engaged by said roller, an expansive spring seated at one end in said bracket, the opposite end of said spring being arranged to engage the free end portion of said rim shaped track and adapted to raise and normally hold it out of the path of said roller, an armature portion adjacent to the pivotal end of said rim shaped track, and an electric magnet arranged in operative make and break relation to said armature, a switch in said car, contacts on each floor in said shaft in circuit with the magnet on each bracket, and with a power source, and a brush on said car arranged to engage the contact of each floor of the building as the car runs up and down in said shaft, a controlling valve for said motor, and electrically operated means in circuit with the switch and magnets for operating said controlling valve.

In testimony whereof I afiix my signature in presence of two witnesses.

. CHARLES M. EINFELDT. Witnesses:

G. Sanonur ELLror'r, ADELLA M. Fownn, 

